You are correct, your Plaid can book your seating for any shows and dining without them being present. You can also do the VIP seating at Paint the Night, then Fireworks (from the Main Street Train Station) and a VIP Plaid in that area will take you over to World of Color if DCA is closed and let you in and take you to the VIP seating there. I'm not sure of the timing right now but in the Spring we like to watch Fireworks, then take the Lilly Belle over to New Orleans Square and watch Fantasmic. You get VIP seating for ANY show and only have to arrive 5 minutes before - it's great!! They have a list with your name on it to refer to.
They can either do the Pet Cemetery with you or have it planned for you. The new VIP perk is they can get you to the front of the line for character greetings so factor that in as well.
We've done the VIP Tour about 6 times so if you have any other questions you can DM me
It's worth it to us. We're doing it again in November!